SHA1_BLOCK_SIZE
if (key_bytes > SHA1_BLOCK_SIZE) {
(void) memset(&k_ipad[i], 0x36, SHA1_BLOCK_SIZE - i);
(void) memset(&k_opad[i], 0x5C, SHA1_BLOCK_SIZE - i);
(void) memset(&k_ipad[i], 0x36, SHA1_BLOCK_SIZE - key_bytes);
(void) memset(&k_opad[i], 0x5C, SHA1_BLOCK_SIZE - key_bytes);
k_ipad, SHA1_BLOCK_SIZE);
k_opad, SHA1_BLOCK_SIZE);
CK_BYTE k_ipad[SHA1_BLOCK_SIZE];
CK_BYTE k_opad[SHA1_BLOCK_SIZE];
#define SHA1_BLOCK_SIZE_MASK (SHA1_BLOCK_SIZE - 1)